Interstellar dust
Interstellar dust
Interstellar dust
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Dust as catalyst:<br />
H 2<br />
observations<br />
Diffuse clouds<br />
Planetary Nebulae<br />
Dying stars<br />
Supernovae remnants<br />
T grain<br />
= 40-80K<br />
T gas<br />
< 6000K<br />
T grain<br />
~ 20K<br />
T gas<br />
~ 100K<br />
T grain<br />
~ 125K<br />
T gas<br />
~ 1000K<br />
Photodissociation Regions<br />
T grain<br />
=10 - 100K<br />
T gas<br />
= 300 - 1000K<br />
PAHs<br />
Newly born stars<br />
T grain<br />
~ 70K<br />
T gas<br />
= 1500 - 2000K<br />
Active galactic nuclei<br />
CO H 2<br />
T grain<br />
= 15- 70K<br />
T gazs<br />
~ 2000K<br />
H 2<br />
forms for a wide range of physical conditions
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